General

  • Target

    CL_Installer1.0.exe

  • Size

    35.9MB

  • Sample

    240622-psafbssdjp

  • MD5

    20ca3507b2365af2c59c5878fcdf0f24

  • SHA1

    4d4ef88d11382ba25ec8ca836037002c777ddc57

  • SHA256

    5f8fb213357549825d6a12e530dbb984c988e1346b9c7ae86a9c8cb8906f5664

  • SHA512

    868dbf94b103a95e17f0a07c6ec84f655fb14d9217126cdc2848f0569953bf0cf1825c628e2f7c711fe7d301ec57578be8905071a39da2d89c23e3cee0b94763

  • SSDEEP

    786432:7JXtZ13U6AvThSY8nWWXcfMhz26IP7IbzJwIuJcwQ/Lj8pS31c6R8NoJSCxXsd:7Jh3U6AvThSY8W+12z7IbKIuOwULIpSG

Malware Config

Targets

    • Target

      CL_Installer1.0.exe

    • Size

      35.9MB

    • MD5

      20ca3507b2365af2c59c5878fcdf0f24

    • SHA1

      4d4ef88d11382ba25ec8ca836037002c777ddc57

    • SHA256

      5f8fb213357549825d6a12e530dbb984c988e1346b9c7ae86a9c8cb8906f5664

    • SHA512

      868dbf94b103a95e17f0a07c6ec84f655fb14d9217126cdc2848f0569953bf0cf1825c628e2f7c711fe7d301ec57578be8905071a39da2d89c23e3cee0b94763

    • SSDEEP

      786432:7JXtZ13U6AvThSY8nWWXcfMhz26IP7IbzJwIuJcwQ/Lj8pS31c6R8NoJSCxXsd:7Jh3U6AvThSY8W+12z7IbKIuOwULIpSG

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • XMRig Miner payload

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Stops running service(s)

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Power Settings

      powercfg controls all configurable power system settings on a Windows system and can be abused to prevent an infected host from locking or shutting down.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks